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Cambridge IGCSE Computer Science practice

Paper 1 structured question: Types and methods of data transmission

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Types and methods of data transmission

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Paper 1Computer Systems6 marks

Explaining the packet switching process.

Description

Packet Switching Process

In packet switching, data is divided into packets that can take different routes through a network. Each packet is managed by routers and may arrive out of order. Once all packets are received, they are reordered based on their packet numbers.

  1. a

    Explain the packet switching process and its significance in data transmission.

    Aim for approximately 6 distinct marking points.

    [6]

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Paper 1 structured question: Types and methods of data transmission

Paper 1Computer Systems1 marks

Description

Components of a Data Packet

A data packet consists of a header, payload, and trailer. The header includes the destination address, packet number, and originator's address. The payload contains the actual data being transmitted, and the trailer may include error-checking information.

  1. a

    State the three main components of a data packet.

    Aim for approximately 1 distinct marking point.

    [1]